Pedogenesis and geochemical alteration of the Picture Gorge subgroup , Columbia River basalt , Oregon

@inproceedings{SheldonPedogenesisAG,
  title={Pedogenesis and geochemical alteration of the Picture Gorge subgroup , Columbia River basalt , Oregon},
  author={Nathan D. Sheldon}
}
Reddened, clay-rich horizons between basalt flows have historically been identified as ‘‘baked zones’’ or as zones of lateral groundwater movement. The reddening has been attributed to thermal or chemical alteration of the permeable portion of the basalt flow. Many of these red horizons are instead paleosols that record significant hiatuses in basalt flow… CONTINUE READING